package com.itheima.demoStringBuilder;

//数组的内容变为字符串
//例如{1, 2, 3} --> [1, 2, 3]
public class Demo02StringBuilder {
    public static void main(String[] args) {
        int[] arr = {1, 2, 3};
        String s = arrayToString(arr);
        System.out.println("s: " + s);
    }


    public static String arrayToString(int[] arr) {
        StringBuilder sb = new StringBuilder("[");
        //sb.append("[");
        for (int i = 0; i < arr.length; i++) {
            if (i == arr.length - 1) {
                sb.append(arr[i]).append("]");
            } else {
                sb.append(arr[i]).append(",").append(" ");
            }
        }
        return sb.toString();
    }
}
